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| 1 | +/* | |
| 2 | + * Copyright (c) 1997, 1998, Oracle and/or its affiliates. All rights reserved. | |
| 3 | + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
| 4 | + * | |
| 5 | + * This code is free software; you can redistribute it and/or modify it | |
| 6 | + * under the terms of the GNU General Public License version 2 only, as | |
| 7 | + * published by the Free Software Foundation. Oracle designates this | |
| 8 | + * particular file as subject to the "Classpath" exception as provided | |
| 9 | + * by Oracle in the LICENSE file that accompanied this code. | |
| 10 | + * | |
| 11 | + * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 12 | + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 13 | + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 14 | + * version 2 for more details (a copy is included in the LICENSE file that | |
| 15 | + * accompanied this code). | |
| 16 | + * | |
| 17 | + * You should have received a copy of the GNU General Public License version | |
| 18 | + * 2 along with this work; if not, write to the Free Software Foundation, | |
| 19 | + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 20 | + * | |
| 21 | + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 22 | + * or visit www.oracle.com if you need additional information or have any | |
| 23 | + * questions. | |
| 24 | + */ | |
| 25 | + | |
| 26 | +package java.awt; | |
| 27 | + | |
| 28 | +import java.awt.image.Raster; | |
| 29 | +import java.awt.image.WritableRaster; | |
| 30 | + | |
| 31 | +/** | |
| 32 | + * The <code>CompositeContext</code> interface defines the encapsulated | |
| 33 | + * and optimized environment for a compositing operation. | |
| 34 | + * <code>CompositeContext</code> objects maintain state for | |
| 35 | + * compositing operations. In a multi-threaded environment, several | |
| 36 | + * contexts can exist simultaneously for a single {@link Composite} | |
| 37 | + * object. | |
| 38 | + * @see Composite | |
| 39 | + */ | |
| 40 | + | |
| 41 | +public interface CompositeContext { | |
| 42 | + /** | |
| 43 | + * Releases resources allocated for a context. | |
| 44 | + */ | |
| 45 | + public void dispose(); | |
| 46 | + | |
| 47 | + /** | |
| 48 | + * Composes the two source {@link Raster} objects and | |
| 49 | + * places the result in the destination | |
| 50 | + * {@link WritableRaster}. Note that the destination | |
| 51 | + * can be the same object as either the first or second | |
| 52 | + * source. Note that <code>dstIn</code> and | |
| 53 | + * <code>dstOut</code> must be compatible with the | |
| 54 | + * <code>dstColorModel</code> passed to the | |
| 55 | + * {@link Composite#createContext(java.awt.image.ColorModel, java.awt.image.ColorModel, java.awt.RenderingHints) createContext} | |
| 56 | + * method of the <code>Composite</code> interface. | |
| 57 | + * @param src the first source for the compositing operation | |
| 58 | + * @param dstIn the second source for the compositing operation | |
| 59 | + * @param dstOut the <code>WritableRaster</code> into which the | |
| 60 | + * result of the operation is stored | |
| 61 | + * @see Composite | |
| 62 | + */ | |
| 63 | + public void compose(Raster src, | |
| 64 | + Raster dstIn, | |
| 65 | + WritableRaster dstOut); | |
| 66 | + | |
| 67 | + | |
| 68 | +} | |